# 2N® Mobile Key vs Leak Defense System

The clearest difference is rating: 2N® Mobile Key at 3.8 against Leak Defense System's 3.0. 2N® Mobile Key also leads on review sentiment (38% vs 13%). Leak Defense System's advantage is update cadence (every 3 weeks vs every 3 months). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

2N® Mobile Key holds the better App Store score, 3.8 against 3.0. Both are backed by a comparable volume of ratings — 37 and 21 respectively. Written reviews point the same way: 38% of 2N® Mobile Key's written reviews are positive against 13% of Leak Defense System's.

2N® Mobile Key ships an update every 3 months, Leak Defense System every 3 weeks. The most recent releases landed on October 24, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | 2N® Mobile Key | Leak Defense System |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.8 (37 ratings)](https://appshunter.io/ios/app/2n-mobile-key/id1121287110/reviews)** | [3.0 (21 ratings)](https://appshunter.io/ios/app/leak-defense-system/id1452931362/reviews) |
| Number of ratings | **37** | 21 |
| Positive reviews | **37.5% of reviews** | 12.5% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 19 MB | 31 MB |
| Requires iOS | 16.0 | **15.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [2N TELEKOMUNIKACE a.s.](https://appshunter.io/developer/656246734) | [Calance](https://appshunter.io/developer/1043184786) |

## What reviewers say

### 2N® Mobile Key

[App page](https://appshunter.io/ios/app/2n-mobile-key/id1121287110)

Transform your mobile phone into a secure digital key for your doors. This app utilizes advanced WaveKey technology for instant, reliable, and secure access. Choose from multiple convenient operation modes for seamless entry.

**Highlights:** Mobile phone as access credential, Patented WaveKey technology, AES encryption, NFC door unlocking, Multiple operation modes (Touch, Tap, Card, Motion), Unlimited free credentials, Time-limited access

**In-app purchases:** none


### Leak Defense System

[App page](https://appshunter.io/ios/app/leak-defense-system/id1452931362)

This system detects plumbing leaks and provides remote water shut-off capabilities for homes, high-rises, or entire buildings. It acts as an emergency shut-off solution, offering advanced control over your water supply.

**Highlights:** Remote water shut-off, Plumbing leak detection, Emergency water shut-off, Smart-home integration, Control for homes, high-rises, and buildings

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is 2N® Mobile Key free?

2N® Mobile Key is free to download, with no in-app purchases.

### Is Leak Defense System free?

Leak Defense System is free to download, with no in-app purchases.

### Which has better reviews, 2N® Mobile Key or Leak Defense System?

2N® Mobile Key is rated higher. 2N® Mobile Key averages 3.8 out of 5 from 37 ratings, while Leak Defense System averages 3.0 from 21 ratings.

### Do 2N® Mobile Key or Leak Defense System have ads?

Neither 2N® Mobile Key nor Leak Defense System shows ads.

### Which is updated more often, 2N® Mobile Key or Leak Defense System?

2N® Mobile Key ships an update every 3 months, and Leak Defense System every 3 weeks. Most recently, 2N® Mobile Key was updated on October 24, 2026 and Leak Defense System on October 7, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*